Wyldstyle should be able to reach the top of the wall if you hit the jump button repeatedly. If this does not work for you, please follow these steps:
- On the left hand side of the scaffolding, using Wyldstyle, double jump in the jump spot to reach a ladder.
- After climbing the ladder, continue on the scaffolding to the back of the level and then follow it across to the right. You should then be able jump over the gaps until you reach the “Locate” keystone.